带有动态正则表达式的Javascript String.replace？ [英] Javascript String.replace with dynamic regular expressions?

问题描述

我有以下代码，但是我需要在运行时向正则表达式对象（ regex2 ）注入一些不同的东西。但是，text.replace似乎不喜欢正则表达式的字符串对象，所以我该如何使它工作？

I have the following code, which works, but I need to inject some different stuff into the regular expression object (regex2) at runtime. However, text.replace does not seem to like a string object for the regular expression, so how can I make this work?

var regex2 = /\|\d+:\d+/;
document.write("result = " + text.replace(regex2, '') + "<br>");

推荐答案

您可以使用字符串制作正则表达式对象 RegExp 构造函数：

You can make a regular expression object from a string using the RegExp constructor function:

var regExp = new RegExp(myString);  // regex pattern string

text.replace(regExp, '');

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